| Romy the Cat wrote:|
Yes, Gordan, it is exactly what I heard about the 10s from the sources that I found rational. The huge plate impedance and a need of very high ration transformer is something that might stop some people who would like to drive 10 full-range but for DSET application it might be a very good tube. BTW, there were a huge variety of the 10 rubes made. Even the 10Y – there were too many of them that were too different. I am still contemplating to get 40K-50K transformer and to try the 10s before I decide where to go with my amps for MF channel. No on sadly makes off the shelf 40K transformer with limited inductance for DSET applications…
| gordan wrote:|
| plus they IMHO sound better - less prejudiced towards a romantic SET sound we all know (and some try to avoid).|
Trying to build an OPT with a very high impedance becomes difficult at best. The capacitance builds up from the additional layers and you get a bad HF roll-off and slew rate limiting. While I was reading your post, one odd thought came to mind. Perhaps get a pair of 10K - 15K OPTs with 16 ohm secondaries. Wire the primaries in series and the secondaries in parallel. Just a thought...
Regarding the 10S... the 1602 is a near identical replacement.
... just because you're paranoid, it doesn't mean they're not after you ...